Audio mixer



FIG. 1 is a perspective view of an audio mixer showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side elevational view of one side thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a side elevational view of the other side thereof.

The broken line showings of the indicia on the rectangular areas of the vertical panel and the controls on both the horizontal and vertical panels are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an audio mixer, as shown and described. 